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发明名称
Ventilating device
摘要
申请公布号
US2513056(A)
申请公布日期
1950.06.27
申请号
US19470743974
申请日期
1947.04.25
申请人
SCALLON FRANK J
发明人
SCALLON FRANK J.
分类号
E04B1/70;E04D13/152;E04D13/17;F24F7/00
主分类号
E04B1/70
代理机构
代理人
主权项
地址
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